Add slide for Yemoche

[yemoche]

This add a new slide to the slide deck

[github-learning-lab]

I was expecting your file to be named _posts/0000-01-02-yemoche.md.

Let's edit this pull request to fix both of these issues.

⌨️ Activity: Fixing the file name in your pull request

1. Check out to your branch:

   git checkout 

2. Type ls to see a listing of your root directory.
3. Confirm that you've got a folder titled _posts.
4. Step into the folder with cd _posts.
5. Type ls to see a listing of your _posts folder.
6. Ensure you've got a file named _posts/0000-01-02-yemoche.md.
7. If you find you have to make any changes, then stage, commit, and push those changes:

   git add .
   git commit -m "<YOUR-MESSAGE>"
   git push

Note: You can find directions on how to move files while editing in our documentation.

If you would like assistance troubleshooting the issue you are encountering, create a post on the GitHub Community board. You might also want to search for your issue to see if other people have resolved it in the past.

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I'll respond below when I detect a commit on this branch.